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首页> 外文会议>Gamma Field Symposia >ALLELIC VARIATION OF HEADING-TRAIT-RELATED GENES, ESSENTIAL FOR WIDE ADAPTATION OF WHEAT, AND ITS APPLICATION TO WHEAT BREEDING
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ALLELIC VARIATION OF HEADING-TRAIT-RELATED GENES, ESSENTIAL FOR WIDE ADAPTATION OF WHEAT, AND ITS APPLICATION TO WHEAT BREEDING

机译：标题相关基因的等位基因变异，对小麦的广泛适应至关重要，及其在小麦滋生中的应用

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Heading time is a complex character controlled by narrow-sense earliness and modified by vernalization requirement and photoperiod response. In the mid-latitude regions, which include Japan, photoperiod response and narrow-sense earliness are equally important for the control of heading time of winter wheat, and vernalization requirement is important for adaptation to winter cold. This review has summarized the genetic basis of heading traits of wheat and the molecular diversity of the Vrn genes for vernalization response. The potential practical use of new alleles identified by molecular analysis is discussed. The difference between spring and winter ecotypes is caused by allelic differences in five homoeologous genes, Vrn-1 to Vrn-5. Among these, vrn-A2 is a recessive gene for spring growth habit, but the others are dominant. By a map-based approach, Vrn-1, Vrn-2, and Vrn-3 have been cloned. Allelic variation of Vrn-A1 was surveyed in 250 landraces of common wheat and 19 accessions of tetraploid wheat. The Vrn-A1 sequence of winter type landraces was identical to that of winter type accessions of T. monococcum. In contrast, four types of sequence variation were identified in spring type landraces of common wheat: Vrn-A1a, with an insertion of 140 bp; Vrn-A1b, with a deletion of 20 bp; Vrn-A1c, without In/Dels (identical to vrn-A1 allele); and an insertion of 124 bp.
机译：前线时间是一种复杂的字符，受到狭义的狭义，通过vernalization要求和photoperiod响应来修改。在包括日本的中纬度地区，光周期反应和狭义，对冬小麦的前线控制同样重要，并且春化要求对于适应冬季感冒是重要的。本综述已经总结了小麦标题性状的遗传基础和VRN基因的富集反应的分子多样性。讨论了分子分析鉴定的新等位基因的潜在实际应用。春季和冬季生态型之间的差异是由五种同源基因的等位基因差异，VRN-1至VRN-5引起。其中，VRN-A2是用于春季生长习性的隐性基因，但其他因素是显性的。通过基于地图的方法，已经克隆了VRN-1，VRN-2和VRN-3。 VRN-A1的等位基因变异在250个普通小麦和19种甲二醇中进行了调查。 VRN-A1冬季体型序列与冬季类型的冬季型涂层序列相同。相比之下，在普通小麦的弹簧式体型中鉴定了四种类型的序列变异：VRN-A1A，插入140bp; VRN-A1B，删除20bp; VRN-A1C，没有IN / DEL（与VRN-A1等位基因相同）;插入124bp。

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    《Gamma Field Symposia》|2006年||共10页
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    Kenji Kato;

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